Hydrocyclone



Aug. 8, 1961 1.. DEMETER HYDROCYCLONE Filed July 21, 1958 INV EV TOR. [.A'JZLU' DEMfTER Y Unite States Pam 2,995,255 HYDROCYCLONE Lfiszl Demeter, Budapest, Hungary, assignor to Licencia Talalmauyokat Ertkesit Vllalat, Budapest, Hungary Filed July 21, 1958, Ser. No. 749,886 3Claims. (Cl. 210-512) This invention relates to hydrocyclones having a cylindrical head part and a conical base part provided with an adjustable discharge orifice, and serving to clean fine suspensions from rough particles. In hydrocyclones of this kind the suspension to be cleaned is tangentially fed into the cylindrical head, from where the cleaned suspension is discharged through a conduit centrally protruding into the head part. In order to eliminate the abrasive action of the suspended material a lining made of a yielding material such as rubber or some synthetic substance is very profitably used, said lining being bonded, e.g. vulcanized, to the metallic walls of the cyclone. The discharge orifice is made adjustable and the regulation is carried out in the case of elastic liners of yielding material by deforming them. Constructions for this purpose hitherto known are in general of involved design. In one embodiment of structure that part of the lining of yielding material lying in the environs of the discharge orifice is deformed by the introduction of air under pressure, see German Patent No. 878,781, or it is compressed radially by means of a clamp ring, as in U.S.A. Patent No. 2,816,658, or it is tightened by axial compression of a rubber ring or block, as in German Patent No. 942,081. For a good function of the hydrocyclones it is essential to keep the discharge orifice permanently circular in section, or else turbulences arise in the fluid stream, whereby good operation and efliciency of the cyclone are injured. With the constructions hitherto known a precise circular section of the discharge orifice could not be reliably assured.

According to the present invention, in a hydrocyclone designed as above the adjustable discharge orifice is formed of a lining of yielding material which extends beyond the conical inner surface of the cyclone and butts against a conical surface adjustable axially of the cyclone and regulating the discharge orifice. Said adjustable conical surface is preferably screwed onto the cylindrical end of the conical under part of the cyclone and may be fixed in its adjusted position by a safety nut. The discharge orifice can thus be regulated by simple adjustment of a threaded member, the conical butting surface of which having a circular cross section, so that also the discharge port of the yielding extension adjusted by said member has circular cross section, whereby the forming of detrimental vortices is prevented. This regulating device is, by its simple structure, especially in the case of smaller hydrocyclones, very advantageous.

Further according to the invention, the yielding liner of the hydrocyclone is fixed to the cyclone body by a releasable bonding, i.e., contrary to earlier types, the liner is not cemented to the cyclone body. The liner has fixing flanges to fasten the liner to the cyclone body.

The accompanying drawings illustrate one embodiment of the invention.

FIG. 1 is a sectional elevation of the hydrocyclone.

FIG. 2 is a section on the line I-I of FIG. 1.

FIGS. 3 and 4 show the under part of the cyclone with the adjustable discharge port in adjusted and fully opened position, respectively.

To the head part 1 of the cyclone a conical part 2 is attached, said parts being held together by a clamp ring 5. The head part is covered by the rubber lining 3 and the conical part is covered by the rubber lining 4. The discharge tube 6 projects centrically into the head part of the cyclone, the arcuate portion 8 of said tube being secured by the threaded junction piece 7. As it is shown in FIG. 2, a further rubber lining piece 9 is attached to the rubber lining 3. To the discharge orifice of the conical part an adjusting member 10 with inner thread is adjoined, which member is secured in its adjusted position by a safety nut 11. To the feed conduit 14 which also constitutes a holding member for the cyclone the inlet pipe end or stub 1' of the hydrocyclone is fixed by union nut 13.

The flange 15 of rubber lining 3 is clamped between head part 1 and conical part 2, whereas the flange 16 on its upper portion seats on the discharge tube 6, where it forms a self-closing fluid seal. Into the stub 1' an extension 17 of the rubber lining 3 protrudes, said extension lying with its shoulder 17' on the inlet stub. To the rubber extension 17 is attached a lining piece 9 having sealing flange 18. The thinner end 19 of said lining piece 9 is cemented to the extension 17.

The upper flange 20 of the rubber lining 4 is also clamped between the head part 1 and the conical bottom part 2. The under portion of rubber lining 4 seats with a fixing flange 21 on the end of the conical part 2 and has a discharge extension 22 of adjustable orifice. Said discharge extension 22 lies in the screwed-on position of the adjusting member 10 on the conical surface 23 of the latter, whereby the diameter of said orifice is adjustable in accordance with the measure of the screwing-on. The circular cross section of the discharge orifice is in every case saved. In FIG. 3 the discharge orifice is shown in its adjustable position of least diameter, whereas in FIG. 4 the diameter of said orifice is the largest.

On the under part of the head 1 contiguous to the conical part 2 there is a rim 24, into which a rim 25 of the conical part 2 precisely fits, assuring thereby the concentricity of the head part and of the lower conical part.

I claim:

1. A hydrocyclone comprising a cylindrical head part having a tangentially directed infeed conduit and a discharge conduit extending upwardly from the central portion thereof, an inverted conical lower member, an orifice controlling member mounted on the lower apex portion of the inverted conical member for axial adjustable movement relative thereto, a releasable lining of yielding material nested in said head part and having an outwardly extending peripheral flange on its lower portion, and a releasable lining of yielding material nested in said inverted conical member and having an outwardly extending peripheral flange on its upper portion abutting the flange on the lower portion of the lining in the head part and a depending lower tubular end portion, means clamping the upper portion of the inverted conical member to the lower portion of the head part with the two abutting lining flanges interposed, the lining in the conical member having an outwardly extending flange spaced above its lower end, said last-mentioned flange being interposed between the lower extremity of the conical member and the orifice controlling member, said orifice controlling member having a tapered seat receiving the lower tubular end of the lining in the conical member operable upon axial movement to vary the constriction of the tubular end portion and the internal cross section thereof.

2. A hydrocyclone according to claim 1 in which the linings apart from the flanges are of substantially uniform thickness.

3. A hydrocyclone according to claim 1 in which only the tubular portion of the conical lining extending beyond the lower fixing flange is deformable by the axially adjustable member.

References Cited in the tile of this patent UNITED STATES PATENTS Cliner Dec. 23, 1952 Krebs Jan. 1, 1957 Braun Dec. 17, 1957 FOREIGN PATENTS France Oct. 22, 1956 

